So I gave it a go and it seems to have made no difference. I was still running most of the games that weren't running natively in 480i. It's not a big problem, was worth trying anyway.

I was running some of my favorite arcade games such as some CPS2 and just thinking how remarkable Groovymame is. I could swear I can't see the slightest difference between Cadillacs and Dinosaurs on this and the actual arcades which I used to play a lot on.

On a side note, is there any way to stop Mame from showing messages for imperfect games? It's not a big deal but if there's something I can add to the ini without breaking anything or causing any issues I'd do it.

So I gave it a go and it seems to have made no difference. I was still running most of the games that weren't running natively in 480i. It's not a big problem, was worth trying anyway.

I was running some of my favorite arcade games such as some CPS2 and just thinking how remarkable Groovymame is. I could swear I can't see the slightest difference between Cadillacs and Dinosaurs on this and the actual arcades which I used to play a lot on.

On a side note, is there any way to stop Mame from showing messages for imperfect games? It's not a big deal but if there's something I can add to the ini without breaking anything or causing any issues I'd do it.

Youíd have to install a no nag version of Groovymame, I bookmarked this from someone elseís post:

Yeah I donít expect that the settings would make a lot of difference although you may get some more accurate speeds without invoking triple buffering because you might indicate a wider range of modelines to choose from because you used Arcade 15. One thing I noticed after posting before was that the upper frequency range in the mame.ini should probably be clamped down for these TVís to be close to 60hz as going above that causes the same problem as going below the 59.xxHz.

I wasn't aware this was no longer removable through the settings. I was sure in the past there was something in the ini to stop the nag but it definitely no longer seems to be there. It's not that big a deal so I'm not sure I want to undergo a fresh install and having to set mame all up again, but thanks for the link, good to know.